阅读说明：本技术 一种防止灌流桩砼流失的装置及施工方法 (Device for preventing concrete loss of perfusion pile and construction method ) 是由 刘更宁 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种防止灌流桩砼流失的装置及施工方法,防止灌流桩砼流失的装置包括刚性筒和支架,刚性筒套设在灌注桩的钢筋笼的外侧,支架包括至少一块连接板,连接板连接刚性筒的内侧与钢筋笼的外侧。防止灌注桩砼流失的施工方法包括在钢筋笼的外侧套设刚性筒,通过支架连接固定刚性筒与钢筋笼,将钢筋笼伸入桩孔中,向桩孔内灌注砼浆。本发明通过在钢筋笼的外侧固定有刚性筒,将钢筋笼插入桩孔中,刚性筒与溶洞相对,再向桩孔内灌注砼浆。本发明中的刚性筒能有效防止砼浆流到溶洞中,因此无需额外清除溶洞中的砼,避免了砼浪费,节约了施工成本,在溶洞地区的适用范围广。(The invention discloses a device for preventing perfusion pile concrete from losing and a construction method thereof. The construction method for preventing the loss of the cast-in-place pile concrete comprises the steps of sleeving a rigid cylinder outside a reinforcement cage, connecting and fixing the rigid cylinder and the reinforcement cage through a support, extending the reinforcement cage into a pile hole, and pouring concrete grout into the pile hole. The invention fixes a rigid cylinder on the outer side of the reinforcement cage, inserts the reinforcement cage into a pile hole, the rigid cylinder is opposite to the karst cave, and then pours concrete slurry into the pile hole. The rigid cylinder can effectively prevent concrete grout from flowing into the karst cave, so that the concrete in the karst cave does not need to be additionally removed, the concrete waste is avoided, the construction cost is saved, and the application range in the karst cave area is wide.)

1. The utility model provides a prevent perfusion stake concrete loss's device which characterized in that includes:

the rigid cylinder (20), the rigid cylinder (20) is sleeved outside the reinforcement cage (10) of the cast-in-place pile;

the support comprises at least one connecting plate (30), and the connecting plate (30) is connected with the inner side of the rigid cylinder (20) and the outer side of the reinforcement cage (10).

2. The device for preventing concrete loss of perfusion pile according to claim 1, wherein: the two ends of the rigid cylinder (20) are respectively provided with an annular elastic deformation piece (40), and the elastic deformation pieces (40) are located between the reinforcement cage (10) and the pile hole.

3. The device for preventing concrete loss of perfusion pile according to claim 2, wherein: the elastic deformation piece (40) is an inflatable air bag or a rubber piece.

4. The device for preventing concrete loss of perfusion pile as claimed in claim 2 or 3, wherein: the elastic deformation piece (40) comprises an upper elastic piece and a lower elastic piece, wherein the upper elastic piece is located above the cavern, and the lower elastic piece is located below the cavern.

5. The device for preventing concrete loss of perfusion pile according to claim 1, wherein: the connecting plates (30) are annular, the number of the connecting plates (30) is more than three, the periphery of each connecting plate (30) is fixedly connected with the inner side of the rigid cylinder (20), and the inner periphery of each connecting plate (30) is fixedly connected with the reinforcement cage (10).

6. The device for preventing concrete loss of perfusion pile according to claim 1, wherein: the support comprises a plurality of longitudinal connecting plates (30), one side of each connecting plate (30) is fixedly connected with the corresponding reinforcement cage (10) along the length direction of the corresponding reinforcement cage (10), and the other side of each connecting plate (30) is fixedly connected with the inside of the corresponding rigid cylinder (20).

7. A construction method for preventing cast-in-place pile concrete loss is characterized by comprising the following steps: the rigid cylinder (20) is sleeved on the outer side of the reinforcement cage (10), the rigid cylinder (20) and the reinforcement cage (10) are connected and fixed through a support, the reinforcement cage (10) extends into a pile hole, and concrete grout is poured into the pile hole.

8. The construction method for preventing the loss of the cast-in-place pile concrete according to claim 7, characterized in that: before the rigid tube (20) is sleeved, annular elastic deformation pieces (40) are arranged at two ends of the rigid tube (20).

9. The construction method for preventing the loss of the concrete of the cast-in-place pile according to claim 8, which is characterized by comprising the following steps:

A. annular inflatable air bags are arranged at two ends of the rigid cylinder (20) along the circumferential direction, and then the rigid cylinder (20) is sleeved on the outer side of the reinforcement cage (10) and fixed through a support;

B. the reinforcement cage (10) is stretched into the pile hole, and the two inflatable air bags are respectively inflated until the inflatable air bags are expanded to be abutted against the inner wall of the pile hole;

C. and pouring concrete slurry into the pile hole to the designed depth.

10. The construction method for preventing the loss of the cast-in-place pile concrete according to claim 9, characterized in that: before the step A, the position and the size of the karst cave communicated with the pile hole are detected, and then a rigid cylinder (20) with a corresponding length is sleeved and fixed at a corresponding position of the reinforcement cage (10) according to the position and the size of each karst cave.

Technical Field

The invention relates to a device for preventing perfusion pile concrete from losing and a construction method for preventing perfusion pile concrete from losing in the technical field of building engineering.

Background

The construction process of the cast-in-place pile generally comprises the steps of drilling a pile hole meeting the requirements on the ground, installing a reinforcement cage in the pile hole, then pouring concrete, and forming the reinforced concrete cast-in-place pile with the supporting function in the pile hole after the concrete is solidified. However, when the cast-in-place pile is installed in a karst cave area, the pile hole is often communicated with a part of the karst cave in the geological layer, and when concrete is poured into the pile hole, the concrete often flows into the karst cave, so that a great amount of concrete is lost and wasted. This not only wastes a large amount of concrete raw materials, also increases the construction cost of pile driving by a wide margin.

Disclosure of Invention

The invention aims to solve at least one technical problem in the prior art and provides a device for preventing concrete loss of a perfusion pile, which can prevent concrete grout from losing into a karst cave.

The invention also provides a construction method for preventing the concrete loss of the perfusion pile.

According to an embodiment of a first aspect of the present invention, there is provided an apparatus for preventing concrete loss of a perfusion pile, including a rigid tube sleeved outside a reinforcement cage of the perfusion pile; the support comprises at least one connecting plate, and the connecting plate is connected with the inner side of the rigid cylinder and the outer side of the reinforcement cage.

According to the embodiment of the first aspect of the present invention, further, two ends of the rigid cylinder are respectively provided with an annular elastic deformation member, and the elastic deformation members are located between the reinforcement cage and the pile hole.

According to an embodiment of the first aspect of the present invention, further, the elastically deformable member is an inflatable bladder or a rubber member.

According to an embodiment of the first aspect of the present invention, further, the elastically deforming member includes an upper elastic member and a lower elastic member, the upper elastic member is located above the cavern, and the lower elastic member is located below the cavern.

According to the embodiment of the first aspect of the present invention, the connecting plates are annular, the number of the connecting plates is three or more, the outer peripheries of the connecting plates are fixedly connected to the inner sides of the rigid cylinders, and the inner peripheries of the connecting plates are fixedly connected to the reinforcement cage.

According to an embodiment of the first aspect of the present invention, the support further includes a plurality of longitudinal connecting plates, one side of each connecting plate is fixedly connected to the reinforcement cage along the length direction of the reinforcement cage, and the other side of each connecting plate is fixedly connected to the inside of the rigid cylinder.

According to the second aspect of the invention, a construction method for preventing concrete loss of a cast-in-place pile is provided, wherein a rigid cylinder is sleeved outside a reinforcement cage, the rigid cylinder and the reinforcement cage are fixedly connected through a bracket, the reinforcement cage is extended into a pile hole, and concrete grout is poured into the pile hole.

According to the embodiment of the second aspect of the present invention, before the rigid tube is sleeved, the annular elastic deformation members are arranged at two ends of the rigid tube.

According to an embodiment of the second aspect of the invention, further, the method comprises the following steps:

A. annular inflatable air bags are arranged at the two ends of the rigid cylinder along the circumferential direction, and then the rigid cylinder is sleeved outside the reinforcement cage and fixed through a support;

B. stretching the reinforcement cage into the pile hole, and respectively inflating the two inflatable air bags until the inflatable air bags are expanded to be abutted against the inner wall of the pile hole;

C. and pouring concrete slurry into the pile hole to the designed depth.

According to the embodiment of the second aspect of the present invention, further, before the step a, the position and size of the cavern communicating with the pile hole are detected, and then the rigid cylinder with the corresponding length is sleeved and fixed on the corresponding position of the reinforcement cage according to the position and size of each cavern.

The invention has the beneficial effects that: the invention fixes a rigid cylinder on the outer side of the reinforcement cage, inserts the reinforcement cage into a pile hole, the rigid cylinder is opposite to the karst cave, and then pours concrete slurry into the pile hole. The rigid cylinder can effectively prevent concrete grout from flowing into the karst cave, so that the concrete in the karst cave does not need to be additionally removed, the concrete waste is avoided, the construction cost is saved, and the application range in the karst cave area is wide.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

FIG. 1 is a front cross-sectional view of an apparatus for preventing concrete loss of a perfusion pile according to a first embodiment of the present invention;

FIG. 2 is a top view of a device for preventing concrete loss of a perfusion pile according to a second embodiment of the present invention;

FIG. 3 is a schematic view of a reinforcement cage according to one embodiment of the present invention;

FIG. 4 is a schematic view of an inflatable bladder after inflation in accordance with a first embodiment of the invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.